# SDR M7K2008F00139

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2007
- Submitted: August 5, 2008
- Operation: Air carrier
- Aircraft: [N818MH](https://openairdocs.org/aircraft/N818MH), registered now
- Make and model: Urocop EC 130 B4
- Registry model: [Urocop EC 130 B4](https://openairdocs.org/model/eurocopter-ec-130-b4) (OpenAirDocs)
- Aircraft serial: 4131
- Engine: Tmeca ARRIEL2B1
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Fitting
- Part number: 350A23422220
- Condition: Cracked
- Location: Tailboom
- Part time: 905 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/M7K2008F00139

## Discrepancy

DURING ROUTINE PERIODIC INSPECTION THE UPPER RT FITTING WAS FOUND WITH 25 INCH CRACK ON ITS BOTTOM ATTACHMENT FLANGE AND THROUGH ONE OF THE 4 REINFORCEMENT RIBS.  A NEW FITTING WAS MATCH DRILLED AND INSTALLED.  THIS IS A FAIRLY COMMON DEFECT THAT OFTEN REPEATS ITSELF ON AN AIRCRAFT BUT HAS BEEN KNOWN NOT TO CRACK ON SOME AC FOR REASONS UNKNOWN.  (K)

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